IS 9236 : 1993 ( Reaffirmed 2002 ) Indian Standard METAL LETTER-RESTS- SPECIFICATION (First Revision ) UDC 6840464.044 0 BTS 1993 BUREAU MANAK OF INDIAN 9 BAHADUR STANDARDS SHAH 110002 ZAFAR MARG BHAVAN, NEW DELHI December 19% Price Gmap 3 Furniture Sectional Committee, CED 35 FOREWORD This standard was adopted by the Bureau of Indian Standards after the draft finalized by the Furniture Sectional Committee had been approved by the Civil Engineering Division Council. and reporters in commercial and Metal letter-rests are commonly used by typists, stenographers government offices. In order to prevent damage of papers, letters and similar stationery material, frequently required for typing, the use of letter-rests not only helps in protection of office stationery but brings out economy and efficiency in procedure. This standard was first published in 1979. ln the revision of this standard been effected: the following changes have 1) Referred Indian Standards have been updated. 2) No. of trays required has been left as an option between the purchaser 3) The minimum spacing between the trays has been fixed. The committee responsible for the preparation For the purpose of deciding whether a particular fmal value, observed or calculated, expressing the accordance with IS 2 : 1960 `Rules for rounding significant places retained in the rounded off value this standard. and the supplier. of this standard is given at Annex B. requirement of this standard is complied with, the result of a test or analysis, shall be rounded off in off numerical values ( revised)`. The number of should be the same as that of the specified value in IS9236: 1993 Indian Standard METAL LETTER-RESTS - SPECIFICATION f First Revision / 1 SCOPE 1.1Thisstandard lays down the requirements for materials, sizes, construction and finish of metal letter-rests. 2 be as agreed supplier. between the purchaser and the 5 FABRICATION 5.1 The letter-rests shall be made from steel sheets not less than O-8mm thick and aluminium sheet not less than 1 mm thick and without any burrs, dents and sharp edges. The top edges of the bottom tray shall be bent over and pressed into a knife edge as shown in Fig. 1. An illustrative sketch of metal letter-rests in shown in Fig. 2. 5.2 The top trays shall be slanting as shown Fig. 2. 6 ASSEMBLY in REFERENCES 2.1 The Indian Standards listed in Annex A are necessary adjuncts to this standard. 3 MATERIALS 3.1 Aluminium Sheets Aluminium sheets shall conform to IS Designation 31000, 31500, 40800 or 52000 in H2 conditions of IS 737 : 1986. 3.2 Electrodes and Filler Rods The welding electrodes and filler rods for gas, spot welding shall conform to arc and TS 1278 : 1972, IS 814 : 1991 and IS 4972 : 1968 respectively. 3.3 Mild Steel Sheets Mild steel sheets shall conform to Grade 0 of IS 1079 : 1988 or Grade 0 of IS 513 : 1986. 4 DIMENSIONS 4.1 Dimensions The overali dimensions as follo\vs: a) Length b) Width 9.2 Tolerances The overall dimensions specified in 4.1 shall not vary by more than & 5 mm. 4.3 The spacing between the trays shall be 65 mm minimum and the number of trays shall of letter-rests shall be A~NDTOLERANCES 6.1 The various components shall be assembled by means of welding or by bending the components to fix in one another or by riveting. 6.2 The method of gas, arc and spot welding shall conform to IS 1323 : 1982, IS 816 : 1969 and IS 819 : 1957 respectively. 6.3 Welding of aluminium parts accordance with IS 2812 : 1964. 7 FINISH 7.1 All dents, burrs and sharp edges shall be removed from the various components. The components shall be individually pickled, scrubbed and rinsed to remove grease, rust, scale or any other foreign element. 7.2 Immediately after pickling all mild steel components shall be given phosphating treatment conforming to class C of IS 3618 : 1966. The process for application of phosphate coating shall be in accordance with IS 6005 : 1970. NOTE - Putty shall be applied to ali the surfaces requiring filling and shall conform to IS 110 : 1983. Aluminium primer shall conform to IS 2660 : 1970. shall be in 380 mm 255 mm J$::l993 FIG. 1 ENLARGED DETAIL OF KNIFB EDGE FIG. 2 ILLUSTRATIVB SKBTCHOF METAL LKTTBR-RHSTS 7.3 Coat/coats of enamel applied as follows: paints shall then be 8.1.2 Flexibility and Adhesion Test a) Finish coat with enamels conforming to IS 151 : 1985, IS 2932 : 1974 or IS 2933 : 1975; and b) In case of stoving enamel the components shall thereafter be baked at a specified temperature in an oven heated uniformly. The finish shall be smooth and uniform with a hard and tough film of enamel strongly adhering to the surface. The finish shall be free from all visible defects and shall not chip when tapped lightly with a dull pointed instrument. 7.4 Powder coating as specified in IS 13871 : 1993 may be done on mild steel components, if required by the purchaser. 7.5 Aluminium components may be anodized if required by the purchaser. The anodic coating shzll not be less than Grade AC 10 of IS 1868 : 1982. 8 TESTS 8.1 The tests given in 8.1.1 to 8.1.4 shall be carried out on the test pieces to check performance requirements of finish. 8.1.1 Hardness Test Tests to be carried as per 5 of IS 101 ( Part 5/ Set 1 ) : 1988. Tests to be carried out ( Part 5Sec 2 ) : 1988. 8.1.3 Impact Resistance Test Tests to be carried Set 3 ) : 1988. 8.1.4 Resistance Condensation as per 2 of IS 101 out as per IS 101 ( Part 51 under Continuous to Humidity Tests to be carried out as per 2 of IS 1101 ( Part 6/Set 1 ) : 1988. 9 INFORMATION PURCHASER 9.1 The TO BE SUPPLIED BY THE purchaser shall supply the following information to the supplier along with the order: a) Colour of finish; b) Where alternative methods of comtruction and finish are specified, they shall be clearly stated in the order; and c) Number of trays. 10 MARKING 10.1 Ail metal letter-rests shah be marked wit,h a suitable mark identifying the manufacturer. 10.1.1 The metal letter-rests with the Standard Mark. may also be marked IS 9236 : 1993. ANNEX A ( Cznuse2.1 ) LIST OF REFERRED INDIAN STANDARDS IS No. Title IS No. Title Methods of sampling and 101 (I&t? S/Set 1 ) : test for paints, varnishes and related products: Part 5 Mechanical test on paint, Section 1 Hardness tests ( third revision ) 101 816 : 1969 Code of practice for use of metal arc welding for general construction in mild steel (_first revision ) 819 : 1957 Methods of sampling and varnishes ( Part S/Set 2 ) : test for paints, and related products: Part 5 1088 Mechanical test on paint, Section 2 Flexibility and ( third test adhesion revision ) Code of practice by resistance spot welding for light assemblies in mild steel 1079 : 1988 Hot rolled carbon steel sheet and strip (fourth revision ) 1278 : 1972 1323 : 1982 Filler rods and wires for welding ( second revision ) gas Methods of sampling and 101 ( Part S/Set 3 ) : test for paints, varnishes and related products: Part 5 1988 Mechanical test on paint, Section 3 Impact resistance ( falling ball test ) ( third revision ) Code of practice for oxyacetylene welding for structural work in mild steels ( second revision ) Anodic coatings on aluminium and its alloys ( second rwision `) Recommendations for manual tungsten inert gas arc welding of aluminium alloys synthetic, exterior Enamel, (b) finishing (a) undercoating. ( first revision ) Enamel exterior (a) undercoating, (b) finishing ( jijir.strevisiotl ) Phosphate treatment of iron and against steel for protection corrosion 1868 : 1982 2812 : 1964 101 \$8rt Methods of sampling and 6/Set 1 ) : test for paints, varnishes and related products: Part 6 Durability test, Section 1 humidity Resistance to Of conditions under condensation Ready mixed paint, brushing, grey filler, for enamels for use over primers (Jirst revision ) 2932 : 1974 110 : 1983 2933 : 1975 3618 : 1966 1.51 : 1985 Ready mixed paint, spraying, finishing, stoving, enamel, for general purposes, colour as required (Jirst revision ) carbon Cold-rolled low steel sheets and strips ( third aluminium and Wrought aluminium alloy plate for general engineering purposes ( third revision ) Covered electrodes for metal arc welding of carbon and carbon manganese steel 513 : 1986 4972 : 1968 Resistance spot ;j!elding electrodes 5660 : 1970 mixed _pai;ii, Ready aluminium-red ( Amendment No. 1 ) brushing, prKlVX revision ) 737 : 1986 6005 : 1970 814 : 1991 Code of practice for phosphating of iron and steel Powder coating Specification 13871 : 1993 IiY 9236 : 1993 ANNEX B ( Foreword ) COMMITTEE Furniture Chnirnran &RlJ. A. COMPOSITION Committee, Institute Sectional National CED 35 Ahmadabad Represenling of Designs, PANGHAL Members G. SE~AK ( Alternate to Shri J. A. Panchal ) Srii, Drlhi of Education Plywood The Indian Mfg Co Pvt Ltd, Bombay New Delhi National Buildings Engineer-in-Chief's Organization, New Delhi Branch, Army Headquarters, Office of the Development Commissioner ( SSI ), New Delhi Indian Tourism Development Corporation, New Delhi Chandan Metal Products Pvt Ltd, Vadodara Indian Institute of Technology, Bombay School of Planning and Architecture. New Delhi Building Materials and Technology Promotion Council, Central Public Works Department, New Delhi Forest Research Indian Smtr TJ I P.IT, SEX ( Alternate ) :;rjrr.~ Y. R. TABICTA, Director-in-Chargr ( Civ Engg Director Institute, Dehra Dun New Delhi Oil Corporation General, Ltd, New Delhi BIS ( Ex-oficio Member ) ) Member-Secretary Deputy SHRI R. Director S. JUNEJA ( Civ Engg ), BIS Metal Furniture Subcommittee, CED 35 : 1 and Architecture, Corporation Xew DelLi Ltd, Bomba! School of Planning Hindustan Aluminium National Buildings Organization, New Delhi Central Buildings Research Institute ( CSIR ), Roorkee Directorate General of Supplies and Disposals, New Delhi Godrej and Boyce Mfg Co Pvt Ltd, Bombay Industries, Energy and Labour Department, Maharashtra Goodlass Nerolac Paints Ltd, Bombay Government of 4 IS 9236 : 1993 ( Cotrfinuedfronz page 4 ) Members Smu S. Ii. KINRA Kepresenting Office of the Development New Delhi Small Scale Steel New Delhi National Commissioner ( Small Scale Industries ), ( Regd ): DEPUTY DII~ECTOR ( MEOH ) ( Altarnate ) kfbh'_4GI~G DIRECTOR SZR~ SEW KUMAR KAPAHI ( Alternate SHIES J. G. SEWAIC ( Alternate ) Salt1 V. N. PATEL SHL~~ P. A, PATEL ( Alternate ) SHRI H. Ii. RMCHRA SJI $:I TILAK RAJ ( Alternate ) sHK1 J. A. PASCHAL ! Furniture Manufacturers Association Institute of Design, Ahmadabad Chandan Metal Products Pvt Ltd, Vadodara Ikgineer-in-Chief's Branch, Army Headquarters, New Delhi 5 .____ --.--~____-.-~~. .-----~ .-...--.... -. ._~ .__ ~____~ Standard Mark The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of Inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. 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